<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<!-- <my-search :bgcolor="'#000000'" :radius="3"></my-search> -->
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滑动区域 -->
			<scroll-view class="left-scrool-view" scroll-y="true" :style="{height:wh+'px'}">
				<block v-for="(item,i) in cateList" :key="i">
					<view :class="['left-scrool-view-item',i===active?'active':'']" @click="activeChanged(i)">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧的滑动区域 -->
				<scroll-view scroll-y="true" :style="{height:wh + 'px'}" :scroll-top="scrollTop">
					<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
						<!-- 二级分类的标题 -->
						<view class="cate-lv2-title">/{{item2.cat_name}}/</view>
						<!-- 当前二级分类下的三级分类列表 -->
						<view class="cate-lv3-list">
							<!-- 三级分类的item项 -->
							<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
								<!-- 三级分类的图片 -->
								<image :src="item3.cat_icon" ></image>
								<!-- 三级分类的文本 -->
								<text>{{item3.cat_name}}</text>
							</view>
						</view>
					</view>
				</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				//当前设备可用高度
				wh:0,
				cateList:[],
				active:0,
				//二级分类的列表
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad(){
			const sysInfo =uni.getSystemInfoSync()
			this.wh=sysInfo.windowHeight-50
			
			this.getCateList()
		},
		methods:{
			//获取分类列表的数据
			async getCateList(){
				const {data:res}= await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !==200)return uni.$showMsg()
				this.cateList = res.message
				
				//为二级分类赋值
				this.cateLevel2 = res.message[0].children
			},
			activeChanged(i){
				this.active = i
				
				//重新为二级分类赋值
				this.cateLevel2=this.cateList[i].children
				
				this.scrollTop = this.scrollTop ===0?1:0
			},
			//跳转到商品列表页面
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display:flex;
	
	.left-scrool-view{
		width:120px;
		
		.left-scrool-view-item{
			background-color: #F7F7F7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			
			&.active{
				background-color: #FFFFFF;
				position: relative;
				
				
				&::before{
					content: ' ';
					display:block;
					width: 3px;
					height: 30px;
					background-color: #C00000;
					position: absolute;
					top: 50%;
					left: 0%;
					transform: translateY(-50%);
				}
			}
		}
	}
}

.cate-lv2-title{
	font-size:12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}

.cate-lv3-list{
	display:flex;
	flex-wrap: wrap;
	.cate-lv3-item{
		width: 33.33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		margin-bottom: 10px;
		image{
			width: 60px;
			height: 60px;
		}
		text{
			font-size: 12px;
		}
	}
}
</style>
